Posted inMySQL
Solving MySQL Replication Lag: Speed Up Syncing with Parallel Replication
Eliminate MySQL Replication Lag using Parallel Replication (MTS) and real-world I/O optimization techniques to keep your systems perfectly in sync.
Posted inNetwork
Mastering Mosquitto MQTT Broker on Linux: From Installation to Real-World Operation
A comprehensive guide to installing Mosquitto MQTT Broker on Linux. Practical tips for security configuration, performance optimization, and troubleshooting IoT connection issues.
Posted inDocker
Docker Checkpoint and Restore with CRIU: Live Container Migration Without Service Downtime
CRIU (Checkpoint/Restore In Userspace) lets you freeze the complete state of a running Docker container and restore it on another server without losing any in-memory state. This guide walks through setting up and using Docker Checkpoint with CRIU for zero-downtime container migration, with practical tips from real-world experience.
Posted inVMware
Using VMware vSphere REST API with Python: Automate VM Management and Inventory Without Installing PowerCLI
Use Python and the vSphere REST API to automate VM management, export inventory to CSV, create snapshots, and run bulk power operations — no PowerCLI installation required, works on any operating system. Includes real-world scripts and tips from hands-on experience running VMware production environments.
Posted inGit
Configuring Branch Protection Rules on GitHub and GitLab: Protecting the Main Branch from Bypassed Code Reviews
How to configure Branch Protection Rules on GitHub and GitLab: require code reviews before merging, block force pushes, and protect the main branch from unreviewed changes in team projects.
Posted inUbuntu
Using cloud-init on Ubuntu Server: Automate System Configuration on First Boot
cloud-init lets Ubuntu Server configure itself automatically on first boot via user-data YAML — no manual SSH required, no steps missed. This post compares cloud-init with bash scripts, breaks down the pros and cons, and walks through a practical deployment with a complete web server user-data example.
Posted inMonitoring
Monitoring Elasticsearch and OpenSearch Clusters with Prometheus Exporter and Grafana: Tracking Index Health, Query Latency, and System Resources
A practical guide to monitoring Elasticsearch and OpenSearch clusters with Prometheus Exporter and Grafana, covering a comparison of approaches, elasticsearch_exporter setup, and alert configuration for JVM heap, unassigned shards, and disk watermark. Hard-won lessons from 6 months running 50 million documents in production.
Posted inMonitoring
How to Install and Configure OpenObserve: A Next-Generation Logs, Metrics, and Traces Solution to Replace ELK Stack with 140x Lower Storage Costs
OpenObserve is a Rust-based observability solution that stores logs, metrics, and traces at up to 140x lower cost than ELK Stack, thanks to Parquet format and efficient data compression. This post shares hands-on experience installing OpenObserve with Docker, configuring Fluent Bit for log collection, querying with SQL, and setting up Alerts to avoid alert fatigue.
Posted inCentos
Deploying Kubernetes with kubeadm on CentOS Stream 9: Building a Production-Ready Cluster with Containerd and Calico CNI
A guide to deploying a production-ready Kubernetes cluster on CentOS Stream 9 with kubeadm, Containerd runtime, and Calico CNI. Covers real-world tips: proper firewall configuration, etcd backup, node draining during maintenance, and avoiding common cluster setup mistakes.
Posted inLinux
Speed Up Linux: Optimize I/O by Moving ‘Hot’ Data to RAM with tmpfs
No matter how fast your disk is, RAM is hundreds of times faster. This guide walks you through using tmpfs to move temporary data into RAM, cut I/O Wait, and instantly speed up your Linux server.